SpdRoot-in-Docker.md

@@ -45,7 +45,7 @@ Run your script :
 ```
 ./spdroot.py mymacro.C
 ```
-Folder /root/spdroot contains SpdRoot source, for your reference. The SpdRoot build is located at /cvmfs/nica.jinr.ru/spd/ubuntu/spdroot.
+Folder /root/spdroot contains SpdRoot source, for your reference. Installed fairsoft, fairroot and spdroot are located in /opt area.
 
 4. Enjoy!
 
@@ -60,3 +60,22 @@ while calling _git pull_, execute command
 export GIT_SSL_NO_VERIFY=1
 ```
 and try again.
+
+5. Some more useful docker interactions :
+- exiting docker prompt will still have the docker container available. One can re-enter the same container by
+```
+docker start `docker ps -q -l`
+docker attach `docker ps -q -l`
+```
+- if you have accidentally multiple containers open of the same version, you can remove by
+```
+docker ps -a #lists all containers, open and exited/paused
+docker rm container_id
+```
+- to exchange files between host machine and spdroot docker container :
+```
+#from host to docker:
+docker cp hostpath/source_file container_id:/dockerpath/target_file
+#from docker to host:
+docker cp container_id:/dockerpath/source_file hostpath/target_file
+```